Assembly & Rigging C Questions and Answers
100% Solved
In order to maintain a constant RPM, engine power must be changed every time the pitch of
the rotor blades changes. Two mechanisms used to accomplish these power changes are the
__________ and the __________. ✔️✔️Correlator, Governor
On most helicopters, throttle consists of a twist-grip mounted at the end of the __________
control. ✔️✔️Collective
The helicopter control that changes the pitch of the rotor blades at a certain point in their
rotation is called the __________ pitch control. ✔️✔️Cyclic
The fuselage of some helicopters is kept relatively level in flight at high airspeed by using a(n)
__________ controlled by the cyclic pitch control to increase by the down load on the tail as
the cyclic control is moved forward. ✔️✔️Synchronized Elevator
Boosted controls on a helicopter cannot feed vibration back through the controls if an
__________ control system is used. ✔️✔️Irreversible
The pitch of the tail rotor is controlled by __________ operated by the pilot. ✔️✔️Pedals
A tail rotor located within a circular duct is called a __________. ✔️✔️Fenestron
A helicopter is inherently __________. ✔️✔️Unstable
Three systems used to increase the stability of a helicopter are : ✔️✔️1. Stabilizer Bar
2. Offset Flapping Hinges
, 3. Stability Augmentation
Low frequency vibration is felt as a(n) __________. ✔️✔️Beat
Vibrations caused the main rotor system are usually of the __________ frequency type.
✔️✔️Low
An out-of-track rotor would normally cause a __________ vibration. ✔️✔️Vertical
An out-of-balance rotor would normally cause a __________ vibration. ✔️✔️Lateral
Helicopter blades must be balanced both: ✔️✔️1. Statically
2. Dynamically
Helicopter blades are balanced in what two directions? ✔️✔️1. Chordwise
2. Spanwise
Three methods of checking main rotor blade track are: ✔️✔️1. Marking stick or flag
2. Strobe light
3. Infrared light
Adjusting the length of the pitch change rods is normally done to correct an out-of-track
condition found __________. ✔️✔️On the ground
Bending the rotor blade trim tabs is normally done to correct an out-of-track condition found
__________. ✔️✔️In flight
100% Solved
In order to maintain a constant RPM, engine power must be changed every time the pitch of
the rotor blades changes. Two mechanisms used to accomplish these power changes are the
__________ and the __________. ✔️✔️Correlator, Governor
On most helicopters, throttle consists of a twist-grip mounted at the end of the __________
control. ✔️✔️Collective
The helicopter control that changes the pitch of the rotor blades at a certain point in their
rotation is called the __________ pitch control. ✔️✔️Cyclic
The fuselage of some helicopters is kept relatively level in flight at high airspeed by using a(n)
__________ controlled by the cyclic pitch control to increase by the down load on the tail as
the cyclic control is moved forward. ✔️✔️Synchronized Elevator
Boosted controls on a helicopter cannot feed vibration back through the controls if an
__________ control system is used. ✔️✔️Irreversible
The pitch of the tail rotor is controlled by __________ operated by the pilot. ✔️✔️Pedals
A tail rotor located within a circular duct is called a __________. ✔️✔️Fenestron
A helicopter is inherently __________. ✔️✔️Unstable
Three systems used to increase the stability of a helicopter are : ✔️✔️1. Stabilizer Bar
2. Offset Flapping Hinges
, 3. Stability Augmentation
Low frequency vibration is felt as a(n) __________. ✔️✔️Beat
Vibrations caused the main rotor system are usually of the __________ frequency type.
✔️✔️Low
An out-of-track rotor would normally cause a __________ vibration. ✔️✔️Vertical
An out-of-balance rotor would normally cause a __________ vibration. ✔️✔️Lateral
Helicopter blades must be balanced both: ✔️✔️1. Statically
2. Dynamically
Helicopter blades are balanced in what two directions? ✔️✔️1. Chordwise
2. Spanwise
Three methods of checking main rotor blade track are: ✔️✔️1. Marking stick or flag
2. Strobe light
3. Infrared light
Adjusting the length of the pitch change rods is normally done to correct an out-of-track
condition found __________. ✔️✔️On the ground
Bending the rotor blade trim tabs is normally done to correct an out-of-track condition found
__________. ✔️✔️In flight
